Science Periodic Table - Elements - Ytterbium Symbol Yb Atomic Number 70 Relative Atomic Mass 12C = 12.0000 173.04 Atomic Radius pm 194 First Ionisation Energy kJ mol-1 603.4 Electronegativity n/a Density kg m-3 6965 [293 K] Molar Volume cm3 24.84 Thermal Conductivity W m-1 K-1 34.9 [300 K] Melting Point K 1097 Boiling Point K 1466 Number of Isotopes 29 Ground State Electron Configuration [Xe]4f146s2 Term Symbol 1S0 Discovery Discovered by J.C. Galissard de Marignac (Geneva, Switzerland) in 1878 Name Derived From Named after Ytterby, Sweden Name in Other Languages  Croatian Iterbij  Danish ytterbium  Dutch ytterbium  Finnish ytterbium  French ytterbium  German Ytterbium  Italian itterbio  Norwegian ytterbium  Portuguese itérbio  Spanish yterbio  Swedish ytterbium Peter van der Krogt's Element Multidict - element name translations in over 48 langauges

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